SNOTEL & ACIS
Precipitation

Month to Date

Water Year to
Date

Definitions:

Water Year: October 1 to September 30Normal: The 1981-2010 average.% of Normal: The current value as percent of the current date’s normal.
% of Normal to Date: In the case of precipitation, the current sub-seasonal
total as % of the normal sub-seasonal total.
Example: October 1-March 13 2005 / October 1 – March 13 Normal
Example: March 1-March 13 2005 / March 1 – March 13 Normal % of Monthly/Annual Total Normal: In the case of precipitation, the current
sub-seasonal total as % of the normal seasonal total.
Example: October 1-March 13 2005 / October 1 – September 30 Normal
Example: March 1-March 13 2005 / March 1 – March 31 Normal SNOTEL (SNOwpack TELemetry): An automated near real-time
data collection network that provides mid to high elevation hydroclimatic data from
mountainous regions of the western United States. A standard SNOTEL
station provides snow water equivalent, snow depth, precipitation, and
temperature data. The SNOTEL network is maintained by the USDA Natural
Resources Conservation Service Snow Survey and Water Supply Forecasting
Program.ACIS: Data served by the Regional Climate Centers and the NOAA National
Climate Data Center’s “Applied Climate Information System”. This includes the
Cooperative Observer Network, the Hourly Surface Airways Network and the
Historical Climatology Network and other regional networks.